Corporation Cannot Represent Itself

An issue that comes up every so often and always leaves me looking for a citation is the long settled rule that a corporation cannot represent itself.  Thanks to the Third DCA in Opella vs. Bayview,  Case No. 3D09-2921 (Fla. 3d DCA Nov. 24, 2010), I now have my case:

Szteinbaum v. Kaes Inversiones y Valores, C.A., 476 So. 2d 247, 248 (Fla. 3d DCA 1985) (“It is well recognized that a corporation, unlike a natural person, cannot represent itself and cannot appear in a court of law without an attorney.”).
When I get a free weekend, I am going to put together a resource for sharing information like this, which is not strictly rules related, but is still frequently used.